*{
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}
body{
    width: 100%;
    max-width: 640px;
    min-width: 320px;
    margin: 0 auto;
    font-size: 14px;
    color: #666;
    line-height: 1.5;
    font-family: -apple-system, Helvetica, sans-serif;
}
img{
    vertical-align: middle;
}
li{
    list-style: none;
}
a{
    text-decoration: none;
    color: #555;
}
.jdapp{
    width: 100%;
}
.jdapp ul li{
    float: left;
    height: 45px;
    line-height: 45px;
    text-align: center;
    color:#fff;
    background-color: #333;
}
.jdapp ul li:nth-child(1){
    width: 8%;
}
.jdapp ul li:nth-child(1) img{
    width: 10px;
}
.jdapp ul li:nth-child(2){
    width: 10%;
}
.jdapp ul li:nth-child(2) img{
    width: 30px;
    vertical-align: middle;
}
.jdapp ul li:nth-child(3){
    width: 57%;

}
.jdapp ul li:nth-child(4){
    background-color: red;
    width: 25%;
}
/* search开始 */
.search-warp{
    position: fixed;
    top: 45px;
    width: 100%;
    max-width: 640px;
    min-width: 320px;
    height: 44px;
    overflow: hidden;
}
.search-btn{
    position: absolute;
    top: 0;
    left: 0;
    width: 40px;
    height: 44px;
}
.search-btn::before{
    content: '';
    display: block;
    width: 20px;
    height: 18px;
    background:url(../images/s-btn.png);
    background-size: 20px 18px;
    margin: 14px 0 0 15px;
}
.search-login{
    position: absolute;
    top: 0;
    right: 0;
    width: 40px;
    height: 44px;
    line-height: 44px;
    text-align: center;
    color: #fff;
}
.search{
    position: relative;
    height: 30px;
    margin: 7px 50px 0;
    border-radius: 15px;
    background-color: #fff;
}
.search input{
    position: absolute;
    top: -8px;
    left: 20px;
    outline: none;
    border: none;
    width: 185px;
    height: 30px;
}
.jd-icon{
    position: absolute;
    top: 8px;
    left: 10px;
    width: 20px;
    height: 15px;
    background: url(../images/jd-sprites.png) no-repeat;
    background-size: 200px;
}
.jd-icon::after{
    content: '';
    position: absolute;
    top: 0;
    right: -6px;
    width: 1px;
    height: 15px;
    background-color: #ccc;
}
.search .sou{
    position: absolute;
    top: 0px;
    right: -30px;
    width: 18px;
    height: 15px;
    background:url(../images/jd-sprites.png) no-repeat -83px 0;
    background-size: 200px 200px;
}
.slider{
    width: 100%;
}
.slider img{
    width: 100%;
}
/* 京东日 */
.brand{
    border-radius: 10px 10px 0 0;
    overflow: hidden;
}
.brand>div{
    float: left;
    width: 33.33%;
}
.brand>div img{
    width: 100%;
}
/* search结束 */
/* nav开始 */
nav a{
    margin-top: 10px;
    float: left;
    text-align: center;
    width: 20%;
}
nav a img{
    width: 40px;
}
nav a span{
    display: block;
}
/* 快报开始 */
.news img{
    width: 100%;
}
.news a{
    float: left;
    margin-top: 10px;
}
.news a:nth-child(1){
    width: 50%;
}
.news a:nth-child(n+2){
    width: 25%;
    border-left: 1px dotted #ddd;
}